RIAPRE is a non-interventional registry to be settled in Italy with the purpose of collecting data on 600 cases of high risk elective percutaneous coronary intervention (PCI) patients treated with an anticoagulation regime different from unfractionated heparin in monotherapy. About thirty catheterization laboratories will co-operate in this activity. The long term outcome of patients will be taken into consideration. The availability of these data will allow for a better understanding of the therapeutic needs in this area.